#!/bin/bash -eu DOMAIN=$1 . get_root echo >&2 enter the text values for $DOMAIN ACME=_acme-challenge.$DOMAIN. FILE=bind.freens/$DOMAIN modify $FILE : fgrep -v "$ACME" add_record() { read CODE if [ -n "$CODE" ]; then echo "$ACME IN TXT \"$CODE\"" >> $FILE fi } add_record add_record ./Sync.sh